Answers

Subtract 20/21 from 15/96

15/96 - 20/21 is -535/672.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 96 and 21 is 672
   
   Next, find the equivalent fraction of both fractional numbers with denominator 672
2. For the 1st fraction, since 96 × 7 = 672,
   15/96 = 15 × 7/96 × 7 = 105/672
3. Likewise, for the 2nd fraction, since 21 × 32 = 672,
   20/21 = 20 × 32/21 × 32 = 640/672
4. Subtract the two like fractions:
   105/672 - 640/672 = 105 - 640/672 = -535/672

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